using System;
/*
 * $Id:  $
 *
 * Copyright 2009 by Bruno Lowagie.
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is 'iText, a free JAVA-PDF library'.
 *
 * The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
 * the Initial Developer are Copyright (C) 1999-2009 by Bruno Lowagie.
 * All Rights Reserved.
 * Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
 * are Copyright (C) 2000-2009 by Paulo Soares. All Rights Reserved.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * Alternatively, the contents of this file may be used under the terms of the
 * LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
 * provisions of LGPL are applicable instead of those above.  If you wish to
 * allow use of your version of this file only under the terms of the LGPL
 * License and not to allow others to use your version of this file under
 * the MPL, indicate your decision by deleting the provisions above and
 * replace them with the notice and other provisions required by the LGPL.
 * If you do not delete the provisions above, a recipient may use your version
 * of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the MPL as stated above or under the terms of the GNU
 * Library General Public License as published by the Free Software Foundation;
 * either version 2 of the License, or any later version.
 *
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
 * details.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://www.lowagie.com/iText/
 */

namespace iTextSharp.text.pdf {

    /**
    * Beginning with BaseVersion 1.7, the extensions dictionary lets developers
    * designate that a given document contains extensions to PDF. The presence
    * of the extension dictionary in a document indicates that it may contain
    * developer-specific PDF properties that extend a particular base version
    * of the PDF specification.
    * The extensions dictionary enables developers to identify their own extensions
    * relative to a base version of PDF. Additionally, the convention identifies
    * extension levels relative to that base version. The intent of this dictionary
    * is to enable developers of PDF-producing applications to identify company-specific
    * specifications (such as this one) that PDF-consuming applications use to
    * interpret the extensions.
    * @since   2.1.6
    */
    public class PdfDeveloperExtension {

        /** An instance of this class for Adobe 1.7 Extension level 3. */
        public static readonly PdfDeveloperExtension ADOBE_1_7_EXTENSIONLEVEL3 =
            new PdfDeveloperExtension(PdfName.ADBE, PdfWriter.PDF_VERSION_1_7, 3);
        
        /** The prefix used in the Extensions dictionary added to the Catalog. */
        protected PdfName prefix;
        /** The base version. */
        protected PdfName baseversion;
        /** The extension level within the baseversion. */
        protected int extensionLevel;
        
        /**
        * Creates a PdfDeveloperExtension object.
        * @param prefix    the prefix referring to the developer
        * @param baseversion   the number of the base version
        * @param extensionLevel    the extension level within the baseverion.
        */
        public PdfDeveloperExtension(PdfName prefix, PdfName baseversion, int extensionLevel) {
            this.prefix = prefix;
            this.baseversion = baseversion;
            this.extensionLevel = extensionLevel;
        }

        /**
        * Gets the prefix name.
        * @return  a PdfName
        */
        public PdfName Prefix {
            get {
                return prefix;
            }
        }

        /**
        * Gets the baseversion name.
        * @return  a PdfName
        */
        public PdfName Baseversion {
            get {
                return baseversion;
            }
        }

        /**
        * Gets the extension level within the baseversion.
        * @return  an integer
        */
        public int ExtensionLevel {
            get {
                return extensionLevel;
            }
        }
        
        /**
        * Generations the developer extension dictionary corresponding
        * with the prefix.
        * @return  a PdfDictionary
        */
        public PdfDictionary GetDeveloperExtensions() {
            PdfDictionary developerextensions = new PdfDictionary();
            developerextensions.Put(PdfName.BASEVERSION, baseversion);
            developerextensions.Put(PdfName.EXTENSIONLEVEL, new PdfNumber(extensionLevel));
            return developerextensions;
        }
    }
}